Corrective intraocular lens

Abstract

An intraocular lens includes a optical body including a posterior concave rface with a first radius of curvature, a periphery and a central, axially aligned opening that enhances liquid circulation in the eye, with the ratio of the height of the optical body to the overall height of the lens being between about 0.25 to about 0.5; a positioning element connected to the optical body periphery and including a periphery and a posterior concave surface with a second radius of curvature greater than the first radius of curvature, a ratio of the first to second radii of curvature being between about 0.31 to about 0.42; and end elements connected with opposite ends of the positioning element, each end element including a proximal end connected with the positioning element periphery, a distal end, a posterior concave surface forming a smooth continuation of the positioning element posterior concave surface and having a curvature identical therewith, and an anterior surface on an opposite side of the end element, the end element anterior surface having a substantially linear slope such that the end element decreases in thickness from the proximal end to the distal end, and the intraocular lens having an outer dimension defined by the distal ends of the end elements which prevents anchoring of the intraocular lens in an eye and thereby permits floating of the intraocular lens in the eye.

What is claimed is: 
     
       1. An intraocular lens for use with a natural crystalline lens of an eye, the eye having an iris, and said intraocular lens having an overall height, said intraocular lens comprising: a part spherical optical body including a posterior concave surface with a first radius of curvature, and a periphery, said optical body having a height, with a ratio of the height of said optical body to said overall height being in the range of about 0.25 to about 0.5;   a part spherical positioning element in surrounding relation to the optical body and connected to the periphery of the optical body, said positioning element including a periphery, and a posterior concave surface with a second radius of curvature greater than said first radius of curvature, a ratio of said first radius of curvature to said second radius of curvature being within a range of about 0.31 to about 0.42; and   end elements connected with opposite ends of said positioning element, each end element including a proximate end connected with the periphery of the positioning element, a distal end, a posterior concave surface forming a smooth continuation of, and having a curvature identical to, the posterior concave surface of said positioning element, and an anterior surface having a slope such that said end element decreases in thickness from said proximal end to said distal end; and   said intraocular lens having an outer dimension defined by the distal ends of said end elements which prevents anchoring of said intraocular lens in an eye such that said positioning element and said end elements float on the natural crystalline lens and said optical body is centered in the iris.   
     
     
       2. An intraocular lens according to claim 1, wherein each of said optical body and said positioning element has a substantially constant thickness. 
     
     
       3. An intraocular lens according to claim 1, wherein said optical body has an opening extending therethrough. 
     
     
       4. An intraocular lens according to claim 3, wherein said opening extends along an axial direction of said optical body and is substantially centrally positioned on said optical body. 
     
     
       5. An intraocular lens according to claim 3, wherein said optical body has an outer diameter in the range of about 4.0 mm to about 5.5 mm, and said opening is circular and has a diameter in the range of about 0.4 mm to about 0.5 mm. 
     
     
       6. An intraocular lens according to claim 1, wherein said positioning element has an outer dimension in the range of about 9.4 mm to about 10.2 mm. 
     
     
       7. An intraocular lens according to claim 1, wherein said anterior surface of each said end element has a substantially linear slope. 
     
     
       8. An intraocular lens according to claim 1, wherein each said end element has a thickness of about 0.1 mm at the proximal end thereof and a thickness of about 0.01 mm at the distal end thereof. 
     
     
       9. An intraocular lens according to claim 1, wherein each said end element has a length of about 0.3 mm. 
     
     
       10. An intraocular lens for use with a natural crystalline lens of an eye, the eye having an iris, and said intraocular lens having an overall height, said intraocular lens comprising: a part spherical optical body having an outer diameter in the range of about 4.0 mm to about 5.5 mm and having a height, with a ratio of the height of said optical body to said overall height being in the range of about 0.25 to about 0.5, and said optical body including a posterior concave surface with a first radius of curvature, a periphery, and a circular opening extending therethrough along an axial direction of said optical body and substantially centrally positioned on said optical body, said opening having a diameter in the range of about 0.4 mm to about 0.5 mm;   a part spherical positioning element in surrounding relation to the optical body and connected to the periphery of the optical body, said positioning element including a periphery having an outer dimension in the range of about 9.4 mm to about 10.2 mm, and a posterior concave surface with a second radius of curvature greater than said first radius of curvature, a ratio of said first radius of curvature to said second radius of curvature being within a range of about 0.31 to about 0.42; and   end elements connected with opposite ends of said positioning element, each end element including a proximal end connected with the periphery of said positioning element, a distal end, a posterior concave surface forming a smooth continuation of, and having a curvature identical to, the posterior concave surface of said positioning element, and an anterior surface having a substantially linear slope such that said end element decreases in thickness from said proximal end to said distal end; and   said intraocular lens having an outer dimension defined by the distal ends of said end elements which prevents anchoring of said intraocular lens in an eye such that said positioning element and said end elements float on the natural crystalline lens and said optical body is centered in an iris of an eye.